The item consists of a 300mm non-UL 50ohm coaxial cable, a miniature connector with gold plated contacts and a 50ohm solder-type molded BNC connector. In this typical case, this is used into a surveillance camera system. It is commonly used in radio, Television, testing equipments and other radio frequency (below 4GHz) electronic equipments. Customization: 75ohm application available Additional Info: BNC connectors have two versions of characteristic impedance 50 and 75 ohm. The 75 ohm type can sometimes be recognized by the reduced or absent dielectric in the mating ends. The 50 and 75 ohm connectors are typically specified for use at frequencies up to 4 and 2 GHz respectively. In order to maximize power transformation, the characteristic impedance of BNC connector and the cable must be matched.